4 * Copyright 1993 Martin Ayotte
5 * Copyright 1994, 1996 Alexandre Julliard
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 * This code was audited for completeness against the documented features
24 * of Comctl32.dll version 6.0 on Oct. 8, 2004, by Dimitrie O. Paun.
26 * Unless otherwise noted, we believe this code to be complete, as per
27 * the specification mentioned above.
28 * If you discover missing features, or bugs, please note them below.
36 #include "wine/winuser16.h"
39 #include "wine/debug.h"
40 #include "user_private.h"
43 WINE_DEFAULT_DEBUG_CHANNEL(scroll);
47 INT curVal; /* Current scroll-bar value */
48 INT minVal; /* Minimum scroll-bar value */
49 INT maxVal; /* Maximum scroll-bar value */
50 INT page; /* Page size of scroll bar (Win32) */
51 UINT flags; /* EnableScrollBar flags */
52 } SCROLLBAR_INFO, *LPSCROLLBAR_INFO;
55 /* Minimum size of the rectangle between the arrows */
56 #define SCROLL_MIN_RECT 4
58 /* Minimum size of the thumb in pixels */
59 #define SCROLL_MIN_THUMB 6
61 /* Overlap between arrows and thumb */
62 #define SCROLL_ARROW_THUMB_OVERLAP 0
64 /* Delay (in ms) before first repetition when holding the button down */
65 #define SCROLL_FIRST_DELAY 200
67 /* Delay (in ms) between scroll repetitions */
68 #define SCROLL_REPEAT_DELAY 50
71 #define SCROLL_TIMER 0
73 /* Scroll-bar hit testing */
76 SCROLL_NOWHERE, /* Outside the scroll bar */
77 SCROLL_TOP_ARROW, /* Top or left arrow */
78 SCROLL_TOP_RECT, /* Rectangle between the top arrow and the thumb */
79 SCROLL_THUMB, /* Thumb rectangle */
80 SCROLL_BOTTOM_RECT, /* Rectangle between the thumb and the bottom arrow */
81 SCROLL_BOTTOM_ARROW /* Bottom or right arrow */
84 /* What to do after SCROLL_SetScrollInfo() */
85 #define SA_SSI_HIDE 0x0001
86 #define SA_SSI_SHOW 0x0002
87 #define SA_SSI_REFRESH 0x0004
88 #define SA_SSI_REPAINT_ARROWS 0x0008
90 /* Thumb-tracking info */
91 static HWND SCROLL_TrackingWin = 0;
92 static INT SCROLL_TrackingBar = 0;
93 static INT SCROLL_TrackingPos = 0;
94 static INT SCROLL_TrackingVal = 0;
95 /* Hit test code of the last button-down event */
96 static enum SCROLL_HITTEST SCROLL_trackHitTest;
97 static BOOL SCROLL_trackVertical;
99 /* Is the moving thumb being displayed? */
100 static BOOL SCROLL_MovingThumb = FALSE;
102 /* Local functions */
103 static BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
104 BOOL fShowH, BOOL fShowV );
105 static INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
106 const SCROLLINFO *info, BOOL bRedraw );
107 static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
108 RECT *rect, INT arrowSize,
109 INT thumbSize, INT thumbPos,
110 UINT flags, BOOL vertical,
111 BOOL top_selected, BOOL bottom_selected );
112 static LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam );
115 /*********************************************************************
116 * scrollbar class descriptor
118 const struct builtin_class_descr SCROLL_builtin_class =
120 "ScrollBar", /* name */
121 CS_DBLCLKS | CS_VREDRAW | CS_HREDRAW | CS_PARENTDC, /* style */
122 NULL, /* procA (winproc is Unicode only) */
123 ScrollBarWndProc, /* procW */
124 sizeof(SCROLLBAR_INFO), /* extra */
125 IDC_ARROW, /* cursor */
129 /***********************************************************************
130 * SCROLL_ScrollInfoValid
132 * Determine if the supplied SCROLLINFO struct is valid.
133 * info [in] The SCROLLINFO struct to be tested
135 inline static BOOL SCROLL_ScrollInfoValid( LPCSCROLLINFO info )
137 return !(info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)
138 || (info->cbSize != sizeof(*info)
139 && info->cbSize != sizeof(*info) - sizeof(info->nTrackPos)));
143 /***********************************************************************
144 * SCROLL_GetInternalInfo
146 * Returns pointer to internal SCROLLBAR_INFO structure for nBar
147 * or NULL if failed (f.i. scroll bar does not exist yet)
148 * If alloc is TRUE and the struct does not exist yet, create it.
150 static SCROLLBAR_INFO *SCROLL_GetInternalInfo( HWND hwnd, INT nBar, BOOL alloc )
152 SCROLLBAR_INFO *infoPtr = NULL;
153 WND *wndPtr = WIN_GetPtr( hwnd );
155 if (!wndPtr || wndPtr == WND_OTHER_PROCESS || wndPtr == WND_DESKTOP) return NULL;
158 case SB_HORZ: infoPtr = (SCROLLBAR_INFO *)wndPtr->pHScroll; break;
159 case SB_VERT: infoPtr = (SCROLLBAR_INFO *)wndPtr->pVScroll; break;
160 case SB_CTL: infoPtr = (SCROLLBAR_INFO *)wndPtr->wExtra; break;
161 case SB_BOTH: WARN("with SB_BOTH"); break;
164 if (!infoPtr && alloc)
166 if (nBar != SB_HORZ && nBar != SB_VERT)
167 WARN("Cannot initialize nBar=%d\n",nBar);
168 else if ((infoPtr = HeapAlloc( GetProcessHeap(), 0, sizeof(SCROLLBAR_INFO) )))
170 /* Set default values */
171 infoPtr->minVal = infoPtr->curVal = infoPtr->page = 0;
172 /* From MSDN: max for a standard scroll bar is 100 by default. */
173 infoPtr->maxVal = 100;
174 /* Scroll bar is enabled by default after create */
175 infoPtr->flags = ESB_ENABLE_BOTH;
176 if (nBar == SB_HORZ) wndPtr->pHScroll = infoPtr;
177 else wndPtr->pVScroll = infoPtr;
180 WIN_ReleasePtr( wndPtr );
185 /***********************************************************************
186 * SCROLL_GetScrollBarRect
188 * Compute the scroll bar rectangle, in drawing coordinates (i.e. client
189 * coords for SB_CTL, window coords for SB_VERT and SB_HORZ).
190 * 'arrowSize' returns the width or height of an arrow (depending on
191 * the orientation of the scrollbar), 'thumbSize' returns the size of
192 * the thumb, and 'thumbPos' returns the position of the thumb
193 * relative to the left or to the top.
194 * Return TRUE if the scrollbar is vertical, FALSE if horizontal.
196 static BOOL SCROLL_GetScrollBarRect( HWND hwnd, INT nBar, RECT *lprect,
197 INT *arrowSize, INT *thumbSize,
202 WND *wndPtr = WIN_GetPtr( hwnd );
204 if (!wndPtr || wndPtr == WND_OTHER_PROCESS || wndPtr == WND_DESKTOP) return FALSE;
209 lprect->left = wndPtr->rectClient.left - wndPtr->rectWindow.left;
210 lprect->top = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
211 lprect->right = wndPtr->rectClient.right - wndPtr->rectWindow.left;
212 lprect->bottom = lprect->top + GetSystemMetrics(SM_CYHSCROLL);
213 if(wndPtr->dwStyle & WS_BORDER) {
216 } else if(wndPtr->dwStyle & WS_VSCROLL)
222 if((wndPtr->dwExStyle & WS_EX_LEFTSCROLLBAR) != 0)
223 lprect->left = wndPtr->rectClient.left - wndPtr->rectWindow.left - GetSystemMetrics(SM_CXVSCROLL);
225 lprect->left = wndPtr->rectClient.right - wndPtr->rectWindow.left;
226 lprect->top = wndPtr->rectClient.top - wndPtr->rectWindow.top;
227 lprect->right = lprect->left + GetSystemMetrics(SM_CXVSCROLL);
228 lprect->bottom = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
229 if(wndPtr->dwStyle & WS_BORDER) {
232 } else if(wndPtr->dwStyle & WS_HSCROLL)
238 GetClientRect( hwnd, lprect );
239 vertical = ((wndPtr->dwStyle & SBS_VERT) != 0);
243 WIN_ReleasePtr( wndPtr );
247 if (vertical) pixels = lprect->bottom - lprect->top;
248 else pixels = lprect->right - lprect->left;
250 if (pixels <= 2*GetSystemMetrics(SM_CXVSCROLL) + SCROLL_MIN_RECT)
252 if (pixels > SCROLL_MIN_RECT)
253 *arrowSize = (pixels - SCROLL_MIN_RECT) / 2;
256 *thumbPos = *thumbSize = 0;
260 SCROLLBAR_INFO *info = SCROLL_GetInternalInfo( hwnd, nBar, FALSE );
263 WARN("called for missing scroll bar");
266 *arrowSize = GetSystemMetrics(SM_CXVSCROLL);
267 pixels -= (2 * (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP));
271 *thumbSize = MulDiv(pixels,info->page,(info->maxVal-info->minVal+1));
272 if (*thumbSize < SCROLL_MIN_THUMB) *thumbSize = SCROLL_MIN_THUMB;
274 else *thumbSize = GetSystemMetrics(SM_CXVSCROLL);
276 if (((pixels -= *thumbSize ) < 0) ||
277 ((info->flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH))
279 /* Rectangle too small or scrollbar disabled -> no thumb */
280 *thumbPos = *thumbSize = 0;
284 INT max = info->maxVal - max( info->page-1, 0 );
285 if (info->minVal >= max)
286 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
288 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP
289 + MulDiv(pixels, (info->curVal-info->minVal),(max - info->minVal));
292 WIN_ReleasePtr( wndPtr );
297 /***********************************************************************
300 * Compute the current scroll position based on the thumb position in pixels
301 * from the top of the scroll-bar.
303 static UINT SCROLL_GetThumbVal( SCROLLBAR_INFO *infoPtr, RECT *rect,
304 BOOL vertical, INT pos )
307 INT pixels = vertical ? rect->bottom-rect->top : rect->right-rect->left;
309 if ((pixels -= 2*(GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP)) <= 0)
310 return infoPtr->minVal;
314 thumbSize = MulDiv(pixels,infoPtr->page,(infoPtr->maxVal-infoPtr->minVal+1));
315 if (thumbSize < SCROLL_MIN_THUMB) thumbSize = SCROLL_MIN_THUMB;
317 else thumbSize = GetSystemMetrics(SM_CXVSCROLL);
319 if ((pixels -= thumbSize) <= 0) return infoPtr->minVal;
321 pos = max( 0, pos - (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP) );
322 if (pos > pixels) pos = pixels;
324 if (!infoPtr->page) pos *= infoPtr->maxVal - infoPtr->minVal;
325 else pos *= infoPtr->maxVal - infoPtr->minVal - infoPtr->page + 1;
326 return infoPtr->minVal + ((pos + pixels / 2) / pixels);
329 /***********************************************************************
332 static BOOL SCROLL_PtInRectEx( LPRECT lpRect, POINT pt, BOOL vertical )
338 rect.left -= lpRect->right - lpRect->left;
339 rect.right += lpRect->right - lpRect->left;
343 rect.top -= lpRect->bottom - lpRect->top;
344 rect.bottom += lpRect->bottom - lpRect->top;
346 return PtInRect( &rect, pt );
349 /***********************************************************************
352 static POINT SCROLL_ClipPos( LPRECT lpRect, POINT pt )
354 if( pt.x < lpRect->left )
357 if( pt.x > lpRect->right )
358 pt.x = lpRect->right;
360 if( pt.y < lpRect->top )
363 if( pt.y > lpRect->bottom )
364 pt.y = lpRect->bottom;
370 /***********************************************************************
373 * Scroll-bar hit testing (don't confuse this with WM_NCHITTEST!).
375 static enum SCROLL_HITTEST SCROLL_HitTest( HWND hwnd, INT nBar,
376 POINT pt, BOOL bDragging )
378 INT arrowSize, thumbSize, thumbPos;
381 BOOL vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
382 &arrowSize, &thumbSize, &thumbPos );
384 if ( (bDragging && !SCROLL_PtInRectEx( &rect, pt, vertical )) ||
385 (!PtInRect( &rect, pt )) ) return SCROLL_NOWHERE;
389 if (pt.y < rect.top + arrowSize) return SCROLL_TOP_ARROW;
390 if (pt.y >= rect.bottom - arrowSize) return SCROLL_BOTTOM_ARROW;
391 if (!thumbPos) return SCROLL_TOP_RECT;
393 if (pt.y < thumbPos) return SCROLL_TOP_RECT;
394 if (pt.y >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
396 else /* horizontal */
398 if (pt.x < rect.left + arrowSize) return SCROLL_TOP_ARROW;
399 if (pt.x >= rect.right - arrowSize) return SCROLL_BOTTOM_ARROW;
400 if (!thumbPos) return SCROLL_TOP_RECT;
402 if (pt.x < thumbPos) return SCROLL_TOP_RECT;
403 if (pt.x >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
409 /***********************************************************************
412 * Draw the scroll bar arrows.
414 static void SCROLL_DrawArrows( HDC hdc, SCROLLBAR_INFO *infoPtr,
415 RECT *rect, INT arrowSize, BOOL vertical,
416 BOOL top_pressed, BOOL bottom_pressed )
422 r.bottom = r.top + arrowSize;
424 r.right = r.left + arrowSize;
426 DrawFrameControl( hdc, &r, DFC_SCROLL,
427 (vertical ? DFCS_SCROLLUP : DFCS_SCROLLLEFT)
428 | (top_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
429 | (infoPtr->flags&ESB_DISABLE_LTUP ? DFCS_INACTIVE : 0 ) );
433 r.top = r.bottom-arrowSize;
435 r.left = r.right-arrowSize;
437 DrawFrameControl( hdc, &r, DFC_SCROLL,
438 (vertical ? DFCS_SCROLLDOWN : DFCS_SCROLLRIGHT)
439 | (bottom_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
440 | (infoPtr->flags&ESB_DISABLE_RTDN ? DFCS_INACTIVE : 0) );
443 static void SCROLL_DrawMovingThumb( HDC hdc, RECT *rect, BOOL vertical,
444 INT arrowSize, INT thumbSize )
446 INT pos = SCROLL_TrackingPos;
450 max_size = rect->bottom - rect->top;
452 max_size = rect->right - rect->left;
454 max_size -= (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) + thumbSize;
456 if( pos < (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) )
457 pos = (arrowSize-SCROLL_ARROW_THUMB_OVERLAP);
458 else if( pos > max_size )
461 SCROLL_DrawInterior_9x( SCROLL_TrackingWin, hdc, SCROLL_TrackingBar,
462 rect, arrowSize, thumbSize, pos,
463 0, vertical, FALSE, FALSE );
465 SCROLL_MovingThumb = !SCROLL_MovingThumb;
468 /***********************************************************************
469 * SCROLL_DrawInterior
471 * Draw the scroll bar interior (everything except the arrows).
473 static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
474 RECT *rect, INT arrowSize,
475 INT thumbSize, INT thumbPos,
476 UINT flags, BOOL vertical,
477 BOOL top_selected, BOOL bottom_selected )
481 HBRUSH hSaveBrush,hBrush;
483 /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
484 * The window-owned scrollbars need to call DEFWND_ControlColor
485 * to correctly setup default scrollbar colors
489 hBrush = (HBRUSH)SendMessageW( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
490 (WPARAM)hdc,(LPARAM)hwnd);
494 hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
497 hSavePen = SelectObject( hdc, SYSCOLOR_GetPen(COLOR_WINDOWFRAME) );
498 hSaveBrush = SelectObject( hdc, hBrush );
500 /* Calculate the scroll rectangle */
504 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
505 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
509 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
510 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
513 /* Draw the scroll rectangles and thumb */
514 if (!thumbPos) /* No thumb to draw */
516 PatBlt( hdc, r.left, r.top,
517 r.right - r.left, r.bottom - r.top,
520 /* cleanup and return */
521 SelectObject( hdc, hSavePen );
522 SelectObject( hdc, hSaveBrush );
528 PatBlt( hdc, r.left, r.top,
530 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
531 top_selected ? 0x0f0000 : PATCOPY );
532 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
533 PatBlt( hdc, r.left, r.top + thumbSize,
535 r.bottom - r.top - thumbSize,
536 bottom_selected ? 0x0f0000 : PATCOPY );
537 r.bottom = r.top + thumbSize;
539 else /* horizontal */
541 PatBlt( hdc, r.left, r.top,
542 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
544 top_selected ? 0x0f0000 : PATCOPY );
545 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
546 PatBlt( hdc, r.left + thumbSize, r.top,
547 r.right - r.left - thumbSize,
549 bottom_selected ? 0x0f0000 : PATCOPY );
550 r.right = r.left + thumbSize;
554 DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT | BF_MIDDLE );
557 SelectObject( hdc, hSavePen );
558 SelectObject( hdc, hSaveBrush );
562 static void SCROLL_DrawInterior( HWND hwnd, HDC hdc, INT nBar,
563 RECT *rect, INT arrowSize,
564 INT thumbSize, INT thumbPos,
565 UINT flags, BOOL vertical,
566 BOOL top_selected, BOOL bottom_selected )
570 HBRUSH hSaveBrush,hBrush;
571 BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
573 if (Save_SCROLL_MovingThumb &&
574 (SCROLL_TrackingWin == hwnd) &&
575 (SCROLL_TrackingBar == nBar))
576 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
578 /* Select the correct brush and pen */
580 /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
581 * The window-owned scrollbars need to call DEFWND_ControlColor
582 * to correctly setup default scrollbar colors
584 if (nBar == SB_CTL) {
585 hBrush = (HBRUSH)SendMessageW( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
586 (WPARAM)hdc,(LPARAM)hwnd);
588 hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
590 hSavePen = SelectObject( hdc, SYSCOLOR_GetPen(COLOR_WINDOWFRAME) );
591 hSaveBrush = SelectObject( hdc, hBrush );
593 /* Calculate the scroll rectangle */
598 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
599 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
603 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
604 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
607 /* Draw the scroll bar frame */
609 /* Draw the scroll rectangles and thumb */
611 if (!thumbPos) /* No thumb to draw */
613 PatBlt( hdc, r.left, r.top, r.right - r.left, r.bottom - r.top, PATCOPY );
615 /* cleanup and return */
616 SelectObject( hdc, hSavePen );
617 SelectObject( hdc, hSaveBrush );
623 PatBlt( hdc, r.left, r.top, r.right - r.left,
624 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
625 top_selected ? 0x0f0000 : PATCOPY );
626 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
627 PatBlt( hdc, r.left, r.top + thumbSize, r.right - r.left,
628 r.bottom - r.top - thumbSize,
629 bottom_selected ? 0x0f0000 : PATCOPY );
630 r.bottom = r.top + thumbSize;
632 else /* horizontal */
634 PatBlt( hdc, r.left, r.top,
635 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
636 r.bottom - r.top, top_selected ? 0x0f0000 : PATCOPY );
637 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
638 PatBlt( hdc, r.left + thumbSize, r.top, r.right - r.left - thumbSize,
639 r.bottom - r.top, bottom_selected ? 0x0f0000 : PATCOPY );
640 r.right = r.left + thumbSize;
645 SelectObject( hdc, GetSysColorBrush(COLOR_BTNFACE) );
646 Rectangle( hdc, r.left+1, r.top+1, r.right-1, r.bottom-1 );
647 DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT );
649 if (Save_SCROLL_MovingThumb &&
650 (SCROLL_TrackingWin == hwnd) &&
651 (SCROLL_TrackingBar == nBar))
652 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
655 SelectObject( hdc, hSavePen );
656 SelectObject( hdc, hSaveBrush );
660 /***********************************************************************
661 * SCROLL_DrawScrollBar
663 * Redraw the whole scrollbar.
665 void SCROLL_DrawScrollBar( HWND hwnd, HDC hdc, INT nBar,
666 BOOL arrows, BOOL interior )
668 INT arrowSize, thumbSize, thumbPos;
671 SCROLLBAR_INFO *infoPtr = SCROLL_GetInternalInfo( hwnd, nBar, FALSE );
672 BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
673 DWORD style = GetWindowLongW( hwnd, GWL_STYLE );
675 if (!(hwnd = WIN_GetFullHandle( hwnd ))) return;
678 ((nBar == SB_VERT) && !(style & WS_VSCROLL)) ||
679 ((nBar == SB_HORZ) && !(style & WS_HSCROLL))) return;
680 if (!WIN_IsWindowDrawable( hwnd, FALSE )) return;
682 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
683 &arrowSize, &thumbSize, &thumbPos );
685 /* do not draw if the scrollbar rectangle is empty */
686 if(IsRectEmpty(&rect)) return;
688 if (Save_SCROLL_MovingThumb &&
689 (SCROLL_TrackingWin == hwnd) &&
690 (SCROLL_TrackingBar == nBar))
691 SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
693 /* Draw the arrows */
695 if (arrows && arrowSize)
697 if( vertical == SCROLL_trackVertical && GetCapture() == hwnd )
698 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
699 (SCROLL_trackHitTest == SCROLL_TOP_ARROW),
700 (SCROLL_trackHitTest == SCROLL_BOTTOM_ARROW) );
702 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
706 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
707 thumbPos, infoPtr->flags, vertical, FALSE, FALSE );
709 if (Save_SCROLL_MovingThumb &&
710 (SCROLL_TrackingWin == hwnd) &&
711 (SCROLL_TrackingBar == nBar))
712 SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
714 /* if scroll bar has focus, reposition the caret */
715 if(hwnd==GetFocus() && (nBar==SB_CTL))
719 SetCaretPos(thumbPos+1, rect.top+1);
723 SetCaretPos(rect.top+1, thumbPos+1);
728 /***********************************************************************
729 * SCROLL_DrawSizeGrip
731 * Draw the size grip.
733 static void SCROLL_DrawSizeGrip( HWND hwnd, HDC hdc)
737 GetClientRect( hwnd, &rc );
738 FillRect( hdc, &rc, GetSysColorBrush(COLOR_SCROLLBAR) );
739 rc.left = max( rc.left, rc.right - GetSystemMetrics(SM_CXVSCROLL) - 1 );
740 rc.top = max( rc.top, rc.bottom - GetSystemMetrics(SM_CYHSCROLL) - 1 );
741 DrawFrameControl( hdc, &rc, DFC_SCROLL, DFCS_SCROLLSIZEGRIP );
745 /***********************************************************************
746 * SCROLL_RefreshScrollBar
748 * Repaint the scroll bar interior after a SetScrollRange() or
749 * SetScrollPos() call.
751 static void SCROLL_RefreshScrollBar( HWND hwnd, INT nBar,
752 BOOL arrows, BOOL interior )
754 HDC hdc = GetDCEx( hwnd, 0,
755 DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW) );
758 SCROLL_DrawScrollBar( hwnd, hdc, nBar, arrows, interior );
759 ReleaseDC( hwnd, hdc );
763 /***********************************************************************
764 * SCROLL_HandleKbdEvent
766 * Handle a keyboard event (only for SB_CTL scrollbars with focus).
769 * hwnd [I] Handle of window with scrollbar(s)
770 * wParam [I] Variable input including enable state
771 * lParam [I] Variable input including input point
773 static void SCROLL_HandleKbdEvent(HWND hwnd, WPARAM wParam, LPARAM lParam)
775 TRACE("hwnd=%p wParam=%d lParam=%ld\n", hwnd, wParam, lParam);
777 /* hide caret on first KEYDOWN to prevent flicker */
778 if ((lParam & PFD_DOUBLEBUFFER_DONTCARE) == 0)
783 case VK_PRIOR: wParam = SB_PAGEUP; break;
784 case VK_NEXT: wParam = SB_PAGEDOWN; break;
785 case VK_HOME: wParam = SB_TOP; break;
786 case VK_END: wParam = SB_BOTTOM; break;
787 case VK_UP: wParam = SB_LINEUP; break;
788 case VK_DOWN: wParam = SB_LINEDOWN; break;
791 SendMessageW(GetParent(hwnd),
792 ((GetWindowLongW( hwnd, GWL_STYLE ) & SBS_VERT) ?
793 WM_VSCROLL : WM_HSCROLL), wParam, (LPARAM)hwnd);
797 /***********************************************************************
798 * SCROLL_HandleScrollEvent
800 * Handle a mouse or timer event for the scrollbar.
801 * 'pt' is the location of the mouse event in client (for SB_CTL) or
802 * windows coordinates.
804 static void SCROLL_HandleScrollEvent( HWND hwnd, INT nBar, UINT msg, POINT pt)
806 /* Previous mouse position for timer events */
808 /* Thumb position when tracking started. */
809 static UINT trackThumbPos;
810 /* Position in the scroll-bar of the last button-down event. */
811 static INT lastClickPos;
812 /* Position in the scroll-bar of the last mouse event. */
813 static INT lastMousePos;
815 enum SCROLL_HITTEST hittest;
816 HWND hwndOwner, hwndCtl;
818 INT arrowSize, thumbSize, thumbPos;
822 SCROLLBAR_INFO *infoPtr = SCROLL_GetInternalInfo( hwnd, nBar, FALSE );
823 if (!infoPtr) return;
824 if ((SCROLL_trackHitTest == SCROLL_NOWHERE) && (msg != WM_LBUTTONDOWN))
827 if (nBar == SB_CTL && (GetWindowLongW( hwnd, GWL_STYLE ) & (SBS_SIZEGRIP | SBS_SIZEBOX)))
831 case WM_LBUTTONDOWN: /* Initialise mouse tracking */
832 HideCaret(hwnd); /* hide caret while holding down LBUTTON */
835 SCROLL_trackHitTest = hittest = SCROLL_THUMB;
838 GetClientRect(GetParent(GetParent(hwnd)),&rect);
843 SCROLL_trackHitTest = hittest = SCROLL_NOWHERE;
844 if (hwnd==GetFocus()) ShowCaret(hwnd);
853 hdc = GetDCEx( hwnd, 0, DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW));
854 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
855 &arrowSize, &thumbSize, &thumbPos );
856 hwndOwner = (nBar == SB_CTL) ? GetParent(hwnd) : hwnd;
857 hwndCtl = (nBar == SB_CTL) ? hwnd : 0;
861 case WM_LBUTTONDOWN: /* Initialise mouse tracking */
862 HideCaret(hwnd); /* hide caret while holding down LBUTTON */
863 SCROLL_trackVertical = vertical;
864 SCROLL_trackHitTest = hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
865 lastClickPos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
866 lastMousePos = lastClickPos;
867 trackThumbPos = thumbPos;
869 if (nBar == SB_CTL && (GetWindowLongW(hwnd, GWL_STYLE) & WS_TABSTOP)) SetFocus( hwnd );
874 hittest = SCROLL_HitTest( hwnd, nBar, pt, TRUE );
879 hittest = SCROLL_NOWHERE;
881 /* if scrollbar has focus, show back caret */
882 if (hwnd==GetFocus()) ShowCaret(hwnd);
887 hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
891 return; /* Should never happen */
894 TRACE("Event: hwnd=%p bar=%d msg=%s pt=%ld,%ld hit=%d\n",
895 hwnd, nBar, SPY_GetMsgName(msg,hwnd), pt.x, pt.y, hittest );
897 switch(SCROLL_trackHitTest)
899 case SCROLL_NOWHERE: /* No tracking in progress */
902 case SCROLL_TOP_ARROW:
903 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
904 (hittest == SCROLL_trackHitTest), FALSE );
905 if (hittest == SCROLL_trackHitTest)
907 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
909 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
910 SB_LINEUP, (LPARAM)hwndCtl );
913 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
914 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
917 else KillSystemTimer( hwnd, SCROLL_TIMER );
920 case SCROLL_TOP_RECT:
921 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
922 thumbPos, infoPtr->flags, vertical,
923 (hittest == SCROLL_trackHitTest), FALSE );
924 if (hittest == SCROLL_trackHitTest)
926 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
928 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
929 SB_PAGEUP, (LPARAM)hwndCtl );
931 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
932 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
935 else KillSystemTimer( hwnd, SCROLL_TIMER );
939 if (msg == WM_LBUTTONDOWN)
941 SCROLL_TrackingWin = hwnd;
942 SCROLL_TrackingBar = nBar;
943 SCROLL_TrackingPos = trackThumbPos + lastMousePos - lastClickPos;
944 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
946 SCROLL_TrackingPos );
947 if (!SCROLL_MovingThumb)
948 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
950 else if (msg == WM_LBUTTONUP)
952 if (SCROLL_MovingThumb)
953 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
954 SCROLL_TrackingWin = 0;
955 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
956 thumbPos, infoPtr->flags, vertical,
959 else /* WM_MOUSEMOVE */
963 if (!SCROLL_PtInRectEx( &rect, pt, vertical )) pos = lastClickPos;
966 pt = SCROLL_ClipPos( &rect, pt );
967 pos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
969 if ( (pos != lastMousePos) || (!SCROLL_MovingThumb) )
971 if (SCROLL_MovingThumb)
972 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
973 arrowSize, thumbSize );
975 SCROLL_TrackingPos = trackThumbPos + pos - lastClickPos;
976 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
978 SCROLL_TrackingPos );
979 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
980 MAKEWPARAM( SB_THUMBTRACK, SCROLL_TrackingVal),
982 if (!SCROLL_MovingThumb)
983 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
984 arrowSize, thumbSize );
989 case SCROLL_BOTTOM_RECT:
990 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
991 thumbPos, infoPtr->flags, vertical,
992 FALSE, (hittest == SCROLL_trackHitTest) );
993 if (hittest == SCROLL_trackHitTest)
995 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
997 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
998 SB_PAGEDOWN, (LPARAM)hwndCtl );
1000 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1001 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1004 else KillSystemTimer( hwnd, SCROLL_TIMER );
1007 case SCROLL_BOTTOM_ARROW:
1008 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
1009 FALSE, (hittest == SCROLL_trackHitTest) );
1010 if (hittest == SCROLL_trackHitTest)
1012 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1014 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1015 SB_LINEDOWN, (LPARAM)hwndCtl );
1018 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1019 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1022 else KillSystemTimer( hwnd, SCROLL_TIMER );
1026 if (msg == WM_LBUTTONDOWN)
1029 if (hittest == SCROLL_THUMB)
1031 UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
1032 trackThumbPos + lastMousePos - lastClickPos );
1033 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1034 MAKEWPARAM( SB_THUMBTRACK, val ), (LPARAM)hwndCtl );
1038 if (msg == WM_LBUTTONUP)
1040 hittest = SCROLL_trackHitTest;
1041 SCROLL_trackHitTest = SCROLL_NOWHERE; /* Terminate tracking */
1043 if (hittest == SCROLL_THUMB)
1045 UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
1046 trackThumbPos + lastMousePos - lastClickPos );
1047 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1048 MAKEWPARAM( SB_THUMBPOSITION, val ), (LPARAM)hwndCtl );
1050 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1051 SB_ENDSCROLL, (LPARAM)hwndCtl );
1054 ReleaseDC( hwnd, hdc );
1058 /***********************************************************************
1059 * SCROLL_TrackScrollBar
1061 * Track a mouse button press on a scroll-bar.
1062 * pt is in screen-coordinates for non-client scroll bars.
1064 void SCROLL_TrackScrollBar( HWND hwnd, INT scrollbar, POINT pt )
1067 INT xoffset = 0, yoffset = 0;
1069 if (scrollbar != SB_CTL)
1071 WND *wndPtr = WIN_GetPtr( hwnd );
1072 if (!wndPtr || wndPtr == WND_OTHER_PROCESS || wndPtr == WND_DESKTOP) return;
1073 xoffset = wndPtr->rectClient.left - wndPtr->rectWindow.left;
1074 yoffset = wndPtr->rectClient.top - wndPtr->rectWindow.top;
1075 WIN_ReleasePtr( wndPtr );
1076 ScreenToClient( hwnd, &pt );
1081 SCROLL_HandleScrollEvent( hwnd, scrollbar, WM_LBUTTONDOWN, pt );
1085 if (!GetMessageW( &msg, 0, 0, 0 )) break;
1086 if (CallMsgFilterW( &msg, MSGF_SCROLLBAR )) continue;
1092 pt.x = (short)LOWORD(msg.lParam) + xoffset;
1093 pt.y = (short)HIWORD(msg.lParam) + yoffset;
1094 SCROLL_HandleScrollEvent( hwnd, scrollbar, msg.message, pt );
1097 TranslateMessage( &msg );
1098 DispatchMessageW( &msg );
1101 if (!IsWindow( hwnd ))
1106 } while (msg.message != WM_LBUTTONUP);
1110 /***********************************************************************
1111 * SCROLL_CreateScrollBar
1113 * Create a scroll bar
1116 * hwnd [I] Handle of window with scrollbar(s)
1117 * lpCreate [I] The style and place of the scroll bar
1119 static void SCROLL_CreateScrollBar(HWND hwnd, LPCREATESTRUCTW lpCreate)
1121 LPSCROLLBAR_INFO info = SCROLL_GetInternalInfo(hwnd, SB_CTL, TRUE);
1124 TRACE("hwnd=%p lpCreate=%p\n", hwnd, lpCreate);
1126 if (lpCreate->style & WS_DISABLED)
1128 info->flags = ESB_DISABLE_BOTH;
1129 TRACE("Created WS_DISABLED scrollbar\n");
1133 if (lpCreate->style & (SBS_SIZEGRIP | SBS_SIZEBOX))
1135 if (lpCreate->style & SBS_SIZEBOXTOPLEFTALIGN)
1136 MoveWindow( hwnd, lpCreate->x, lpCreate->y, GetSystemMetrics(SM_CXVSCROLL)+1,
1137 GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1138 else if(lpCreate->style & SBS_SIZEBOXBOTTOMRIGHTALIGN)
1139 MoveWindow( hwnd, lpCreate->x+lpCreate->cx-GetSystemMetrics(SM_CXVSCROLL)-1,
1140 lpCreate->y+lpCreate->cy-GetSystemMetrics(SM_CYHSCROLL)-1,
1141 GetSystemMetrics(SM_CXVSCROLL)+1,
1142 GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1144 else if (lpCreate->style & SBS_VERT)
1146 if (lpCreate->style & SBS_LEFTALIGN)
1147 MoveWindow( hwnd, lpCreate->x, lpCreate->y,
1148 GetSystemMetrics(SM_CXVSCROLL)+1, lpCreate->cy, FALSE );
1149 else if (lpCreate->style & SBS_RIGHTALIGN)
1151 lpCreate->x+lpCreate->cx-GetSystemMetrics(SM_CXVSCROLL)-1,
1153 GetSystemMetrics(SM_CXVSCROLL)+1, lpCreate->cy, FALSE );
1157 if (lpCreate->style & SBS_TOPALIGN)
1158 MoveWindow( hwnd, lpCreate->x, lpCreate->y,
1159 lpCreate->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1160 else if (lpCreate->style & SBS_BOTTOMALIGN)
1163 lpCreate->y+lpCreate->cy-GetSystemMetrics(SM_CYHSCROLL)-1,
1164 lpCreate->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1169 /*************************************************************************
1170 * SCROLL_GetScrollInfo
1172 * Internal helper for the API function
1175 * hwnd [I] Handle of window with scrollbar(s)
1176 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1177 * info [IO] fMask specifies which values to retrieve
1180 * FALSE if requested field not filled (f.i. scroll bar does not exist)
1182 static BOOL SCROLL_GetScrollInfo(HWND hwnd, INT nBar, LPSCROLLINFO info)
1184 LPSCROLLBAR_INFO infoPtr;
1186 /* handle invalid data structure */
1187 if (!SCROLL_ScrollInfoValid(info)
1188 || !(infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, FALSE)))
1191 /* fill in the desired scroll info structure */
1192 if (info->fMask & SIF_PAGE) info->nPage = infoPtr->page;
1193 if (info->fMask & SIF_POS) info->nPos = infoPtr->curVal;
1194 if ((info->fMask & SIF_TRACKPOS) && (info->cbSize == sizeof(*info)))
1195 info->nTrackPos = (SCROLL_TrackingWin == WIN_GetFullHandle(hwnd)) ? SCROLL_TrackingVal : infoPtr->curVal;
1196 if (info->fMask & SIF_RANGE)
1198 info->nMin = infoPtr->minVal;
1199 info->nMax = infoPtr->maxVal;
1202 return (info->fMask & SIF_ALL) != 0;
1206 /*************************************************************************
1207 * SCROLL_GetScrollBarInfo
1209 * Internal helper for the API function
1212 * hwnd [I] Handle of window with scrollbar(s)
1213 * idObject [I] One of OBJID_CLIENT, OBJID_HSCROLL, or OBJID_VSCROLL
1214 * info [IO] cbSize specifies the size of the structure
1219 static BOOL SCROLL_GetScrollBarInfo(HWND hwnd, LONG idObject, LPSCROLLBARINFO info)
1221 LPSCROLLBAR_INFO infoPtr;
1224 DWORD style = GetWindowLongW(hwnd, GWL_STYLE);
1229 case OBJID_CLIENT: nBar = SB_CTL; break;
1230 case OBJID_HSCROLL: nBar = SB_HORZ; break;
1231 case OBJID_VSCROLL: nBar = SB_VERT; break;
1232 default: return FALSE;
1235 /* handle invalid data structure */
1236 if (!info->cbSize != sizeof(*info))
1239 if (!SCROLL_GetScrollBarRect(hwnd, nBar, &info->rcScrollBar, &nDummy,
1240 &info->dxyLineButton, &info->xyThumbTop))
1243 info->xyThumbBottom = info->xyThumbTop + info->dxyLineButton;
1245 infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, TRUE);
1247 /* Scroll bar state */
1248 info->rgstate[0] = 0;
1249 if ((nBar == SB_HORZ && !(style & WS_HSCROLL))
1250 || (nBar == SB_VERT && !(style & WS_VSCROLL)))
1251 info->rgstate[0] |= STATE_SYSTEM_INVISIBLE;
1252 if (infoPtr->minVal >= infoPtr->maxVal - max(infoPtr->page - 1, 0))
1254 if (!(info->rgstate[0] & STATE_SYSTEM_INVISIBLE))
1255 info->rgstate[0] |= STATE_SYSTEM_UNAVAILABLE;
1257 info->rgstate[0] |= STATE_SYSTEM_OFFSCREEN;
1259 if (nBar == SB_CTL && !IsWindowEnabled(hwnd))
1260 info->rgstate[0] |= STATE_SYSTEM_UNAVAILABLE;
1262 pressed = ((nBar == SB_VERT) == SCROLL_trackVertical && GetCapture() == hwnd);
1264 /* Top/left arrow button state. MSDN says top/right, but I don't believe it */
1265 info->rgstate[1] = 0;
1266 if (pressed && SCROLL_trackHitTest == SCROLL_TOP_ARROW)
1267 info->rgstate[1] |= STATE_SYSTEM_PRESSED;
1268 if (infoPtr->flags & ESB_DISABLE_LTUP)
1269 info->rgstate[1] |= STATE_SYSTEM_UNAVAILABLE;
1271 /* Page up/left region state. MSDN says up/right, but I don't believe it */
1272 info->rgstate[2] = 0;
1273 if (infoPtr->curVal == infoPtr->minVal)
1274 info->rgstate[2] |= STATE_SYSTEM_INVISIBLE;
1275 if (pressed && SCROLL_trackHitTest == SCROLL_TOP_RECT)
1276 info->rgstate[2] |= STATE_SYSTEM_PRESSED;
1279 info->rgstate[3] = 0;
1280 if (pressed && SCROLL_trackHitTest == SCROLL_THUMB)
1281 info->rgstate[3] |= STATE_SYSTEM_PRESSED;
1283 /* Page down/right region state. MSDN says down/left, but I don't believe it */
1284 info->rgstate[4] = 0;
1285 if (infoPtr->curVal >= infoPtr->maxVal - 1)
1286 info->rgstate[4] |= STATE_SYSTEM_INVISIBLE;
1287 if (pressed && SCROLL_trackHitTest == SCROLL_BOTTOM_RECT)
1288 info->rgstate[4] |= STATE_SYSTEM_PRESSED;
1290 /* Bottom/right arrow button state. MSDN says bottom/left, but I don't believe it */
1291 info->rgstate[5] = 0;
1292 if (pressed && SCROLL_trackHitTest == SCROLL_BOTTOM_ARROW)
1293 info->rgstate[5] |= STATE_SYSTEM_PRESSED;
1294 if (infoPtr->flags & ESB_DISABLE_RTDN)
1295 info->rgstate[5] |= STATE_SYSTEM_UNAVAILABLE;
1301 /*************************************************************************
1302 * SCROLL_GetScrollPos
1304 * Internal helper for the API function
1307 * hwnd [I] Handle of window with scrollbar(s)
1308 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1310 static INT SCROLL_GetScrollPos(HWND hwnd, INT nBar)
1312 LPSCROLLBAR_INFO infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, FALSE);
1313 return infoPtr ? infoPtr->curVal: 0;
1317 /*************************************************************************
1318 * SCROLL_GetScrollRange
1320 * Internal helper for the API function
1323 * hwnd [I] Handle of window with scrollbar(s)
1324 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1325 * lpMin [O] Where to store minimum value
1326 * lpMax [O] Where to store maximum value
1330 static BOOL SCROLL_GetScrollRange(HWND hwnd, INT nBar, LPINT lpMin, LPINT lpMax)
1332 LPSCROLLBAR_INFO infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, FALSE);
1336 if (lpMin) *lpMin = infoPtr ? infoPtr->minVal : 0;
1337 if (lpMax) *lpMax = infoPtr ? infoPtr->maxVal : 0;
1343 /*************************************************************************
1344 * SCROLL_SetScrollRange
1347 * hwnd [I] Handle of window with scrollbar(s)
1348 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1349 * lpMin [I] Minimum value
1350 * lpMax [I] Maximum value
1353 static BOOL SCROLL_SetScrollRange(HWND hwnd, INT nBar, INT minVal, INT maxVal)
1355 LPSCROLLBAR_INFO infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, FALSE);
1357 TRACE("hwnd=%p nBar=%d min=%d max=%d\n", hwnd, nBar, minVal, maxVal);
1361 infoPtr->minVal = minVal;
1362 infoPtr->maxVal = maxVal;
1368 /***********************************************************************
1371 static LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam )
1373 if (!IsWindow( hwnd )) return 0;
1378 SCROLL_CreateScrollBar(hwnd, (LPCREATESTRUCTW)lParam);
1383 SCROLLBAR_INFO *infoPtr;
1384 if ((infoPtr = SCROLL_GetInternalInfo( hwnd, SB_CTL, FALSE )))
1386 infoPtr->flags = wParam ? ESB_ENABLE_BOTH : ESB_DISABLE_BOTH;
1387 SCROLL_RefreshScrollBar(hwnd, SB_CTL, TRUE, TRUE);
1392 case WM_LBUTTONDBLCLK:
1393 case WM_LBUTTONDOWN:
1396 pt.x = (short)LOWORD(lParam);
1397 pt.y = (short)HIWORD(lParam);
1398 SCROLL_TrackScrollBar( hwnd, SB_CTL, pt );
1406 pt.x = (short)LOWORD(lParam);
1407 pt.y = (short)HIWORD(lParam);
1408 SCROLL_HandleScrollEvent( hwnd, SB_CTL, message, pt );
1413 SCROLL_HandleKbdEvent(hwnd, wParam, lParam);
1422 /* Create a caret when a ScrollBar get focus */
1424 int arrowSize, thumbSize, thumbPos, vertical;
1425 vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,
1426 &arrowSize, &thumbSize, &thumbPos );
1429 CreateCaret(hwnd, (HBITMAP)1, thumbSize-2, rect.bottom-rect.top-2);
1430 SetCaretPos(thumbPos+1, rect.top+1);
1434 CreateCaret(hwnd, (HBITMAP)1, rect.right-rect.left-2,thumbSize-2);
1435 SetCaretPos(rect.top+1, thumbPos+1);
1444 int arrowSize, thumbSize, thumbPos, vertical;
1445 vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,&arrowSize, &thumbSize, &thumbPos );
1447 rect.left=thumbPos+1;
1448 rect.right=rect.left+thumbSize;
1452 rect.top=thumbPos+1;
1453 rect.bottom=rect.top+thumbSize;
1456 InvalidateRect(hwnd,&rect,0);
1465 return DLGC_WANTARROWS; /* Windows returns this value */
1470 HDC hdc = wParam ? (HDC)wParam : BeginPaint(hwnd, &ps);
1471 if (GetWindowLongW( hwnd, GWL_STYLE ) & SBS_SIZEGRIP)
1473 SCROLL_DrawSizeGrip( hwnd, hdc);
1475 else if (GetWindowLongW( hwnd, GWL_STYLE ) & SBS_SIZEBOX)
1478 GetClientRect( hwnd, &rc );
1479 FillRect( hdc, &rc, GetSysColorBrush(COLOR_SCROLLBAR) );
1482 SCROLL_DrawScrollBar( hwnd, hdc, SB_CTL, TRUE, TRUE );
1483 if (!wParam) EndPaint(hwnd, &ps);
1489 return SetScrollPos( hwnd, SB_CTL, wParam, (BOOL)lParam );
1493 return SCROLL_GetScrollPos(hwnd, SB_CTL);
1495 case SBM_SETRANGE16:
1496 if (wParam) message = SBM_SETRANGEREDRAW;
1497 wParam = LOWORD(lParam);
1498 lParam = HIWORD(lParam);
1500 case SBM_SETRANGEREDRAW:
1503 INT oldPos = SCROLL_GetScrollPos( hwnd, SB_CTL );
1504 SCROLL_SetScrollRange( hwnd, SB_CTL, wParam, lParam );
1505 if (message == SBM_SETRANGEREDRAW)
1506 SCROLL_RefreshScrollBar( hwnd, SB_CTL, TRUE, TRUE );
1507 if (oldPos != SCROLL_GetScrollPos( hwnd, SB_CTL )) return oldPos;
1511 case SBM_GETRANGE16:
1515 SCROLL_GetScrollRange(hwnd, SB_CTL, &min, &max);
1516 return MAKELRESULT(min, max);
1520 return SCROLL_GetScrollRange(hwnd, SB_CTL, (LPINT)wParam, (LPINT)lParam);
1522 case SBM_ENABLE_ARROWS16:
1523 case SBM_ENABLE_ARROWS:
1524 return EnableScrollBar( hwnd, SB_CTL, wParam );
1526 case SBM_SETSCROLLINFO:
1527 return SCROLL_SetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam, wParam );
1529 case SBM_GETSCROLLINFO:
1530 return SCROLL_GetScrollInfo(hwnd, SB_CTL, (SCROLLINFO *)lParam);
1532 case SBM_GETSCROLLBARINFO:
1533 return SCROLL_GetScrollBarInfo(hwnd, OBJID_CLIENT, (SCROLLBARINFO *)lParam);
1542 ERR("unknown Win32 msg %04x wp=%08x lp=%08lx\n",
1543 message, wParam, lParam );
1547 if (message >= WM_USER)
1548 WARN("unknown msg %04x wp=%04x lp=%08lx\n",
1549 message, wParam, lParam );
1550 return DefWindowProcW( hwnd, message, wParam, lParam );
1556 /*************************************************************************
1557 * SetScrollInfo (USER32.@)
1559 * SetScrollInfo can be used to set the position, upper bound,
1560 * lower bound, and page size of a scrollbar control.
1563 * hwnd [I] Handle of window with scrollbar(s)
1564 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1565 * info [I] Specifies what to change and new values
1566 * bRedraw [I] Should scrollbar be redrawn afterwards?
1569 * Scrollbar position
1572 * For 100 lines of text to be displayed in a window of 25 lines,
1573 * one would for instance use info->nMin=0, info->nMax=75
1574 * (corresponding to the 76 different positions of the window on
1575 * the text), and info->nPage=25.
1577 INT WINAPI SetScrollInfo(HWND hwnd, INT nBar, const SCROLLINFO *info, BOOL bRedraw)
1579 TRACE("hwnd=%p nBar=%d info=%p, bRedraw=%d\n", hwnd, nBar, info, bRedraw);
1581 /* Refer SB_CTL requests to the window */
1583 return SendMessageW(hwnd, SBM_SETSCROLLINFO, bRedraw, (LPARAM)info);
1585 return SCROLL_SetScrollInfo( hwnd, nBar, info, bRedraw );
1588 static INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar, LPCSCROLLINFO info, BOOL bRedraw )
1590 /* Update the scrollbar state and set action flags according to
1591 * what has to be done graphics wise. */
1593 SCROLLBAR_INFO *infoPtr;
1597 /* handle invalid data structure */
1598 if (!SCROLL_ScrollInfoValid(info)
1599 || !(infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, TRUE)))
1602 if (TRACE_ON(scroll))
1604 TRACE("hwnd=%p bar=%d", hwnd, nBar);
1605 if (info->fMask & SIF_PAGE) TRACE( " page=%d", info->nPage );
1606 if (info->fMask & SIF_POS) TRACE( " pos=%d", info->nPos );
1607 if (info->fMask & SIF_RANGE) TRACE( " min=%d max=%d", info->nMin, info->nMax );
1611 /* Set the page size */
1613 if (info->fMask & SIF_PAGE)
1615 if( infoPtr->page != info->nPage && info->nPage >= 0)
1617 infoPtr->page = info->nPage;
1618 action |= SA_SSI_REFRESH;
1622 /* Set the scroll pos */
1624 if (info->fMask & SIF_POS)
1626 if( infoPtr->curVal != info->nPos )
1628 infoPtr->curVal = info->nPos;
1629 action |= SA_SSI_REFRESH;
1633 /* Set the scroll range */
1635 if (info->fMask & SIF_RANGE)
1637 /* Invalid range -> range is set to (0,0) */
1638 if ((info->nMin > info->nMax) ||
1639 ((UINT)(info->nMax - info->nMin) >= 0x80000000))
1641 action |= SA_SSI_REFRESH;
1642 infoPtr->minVal = 0;
1643 infoPtr->maxVal = 0;
1647 if( infoPtr->minVal != info->nMin ||
1648 infoPtr->maxVal != info->nMax )
1650 action |= SA_SSI_REFRESH;
1651 infoPtr->minVal = info->nMin;
1652 infoPtr->maxVal = info->nMax;
1657 /* Make sure the page size is valid */
1658 if (infoPtr->page < 0) infoPtr->page = 0;
1659 else if (infoPtr->page > infoPtr->maxVal - infoPtr->minVal + 1 )
1660 infoPtr->page = infoPtr->maxVal - infoPtr->minVal + 1;
1662 /* Make sure the pos is inside the range */
1664 if (infoPtr->curVal < infoPtr->minVal)
1665 infoPtr->curVal = infoPtr->minVal;
1666 else if (infoPtr->curVal > infoPtr->maxVal - max( infoPtr->page-1, 0 ))
1667 infoPtr->curVal = infoPtr->maxVal - max( infoPtr->page-1, 0 );
1669 TRACE(" new values: page=%d pos=%d min=%d max=%d\n",
1670 infoPtr->page, infoPtr->curVal,
1671 infoPtr->minVal, infoPtr->maxVal );
1673 /* don't change the scrollbar state if SetScrollInfo
1674 * is just called with SIF_DISABLENOSCROLL
1676 if(!(info->fMask & SIF_ALL)) goto done;
1678 /* Check if the scrollbar should be hidden or disabled */
1680 if (info->fMask & (SIF_RANGE | SIF_PAGE | SIF_DISABLENOSCROLL))
1682 new_flags = infoPtr->flags;
1683 if (infoPtr->minVal >= infoPtr->maxVal - max( infoPtr->page-1, 0 ))
1685 /* Hide or disable scroll-bar */
1686 if (info->fMask & SIF_DISABLENOSCROLL)
1688 new_flags = ESB_DISABLE_BOTH;
1689 action |= SA_SSI_REFRESH;
1691 else if ((nBar != SB_CTL) && (action & SA_SSI_REFRESH))
1693 action = SA_SSI_HIDE;
1696 else /* Show and enable scroll-bar only if no page only changed. */
1697 if (info->fMask != SIF_PAGE)
1699 new_flags = ESB_ENABLE_BOTH;
1700 if ((nBar != SB_CTL) && ( (action & SA_SSI_REFRESH) ))
1701 action |= SA_SSI_SHOW;
1704 if (infoPtr->flags != new_flags) /* check arrow flags */
1706 infoPtr->flags = new_flags;
1707 action |= SA_SSI_REPAINT_ARROWS;
1712 if( action & SA_SSI_HIDE )
1713 SCROLL_ShowScrollBar( hwnd, nBar, FALSE, FALSE );
1716 if( action & SA_SSI_SHOW )
1717 if( SCROLL_ShowScrollBar( hwnd, nBar, TRUE, TRUE ) )
1718 return infoPtr->curVal; /* SetWindowPos() already did the painting */
1721 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1722 else if( action & SA_SSI_REPAINT_ARROWS )
1723 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, FALSE );
1726 /* Return current position */
1727 return infoPtr->curVal;
1731 /*************************************************************************
1732 * GetScrollInfo (USER32.@)
1734 * GetScrollInfo can be used to retrieve the position, upper bound,
1735 * lower bound, and page size of a scrollbar control.
1738 * hwnd [I] Handle of window with scrollbar(s)
1739 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1740 * info [IO] fMask specifies which values to retrieve
1743 * TRUE if SCROLLINFO is filled
1745 BOOL WINAPI GetScrollInfo(HWND hwnd, INT nBar, LPSCROLLINFO info)
1747 TRACE("hwnd=%p nBar=%d info=%p\n", hwnd, nBar, info);
1749 /* Refer SB_CTL requests to the window */
1751 SendMessageW(hwnd, SBM_GETSCROLLINFO, (WPARAM)0, (LPARAM)info);
1753 SCROLL_GetScrollInfo(hwnd, nBar, info);
1759 /*************************************************************************
1760 * GetScrollBarInfo (USER32.@)
1762 * GetScrollBarInfo can be used to retrieve information about a scrollbar
1766 * hwnd [I] Handle of window with scrollbar(s)
1767 * idObject [I] One of OBJID_CLIENT, OBJID_HSCROLL, or OBJID_VSCROLL
1768 * info [IO] cbSize specifies the size of SCROLLBARINFO
1773 BOOL WINAPI GetScrollBarInfo(HWND hwnd, LONG idObject, LPSCROLLBARINFO info)
1775 TRACE("hwnd=%p idObject=%ld info=%p\n", hwnd, idObject, info);
1777 /* Refer OBJID_CLIENT requests to the window */
1778 if (idObject == OBJID_CLIENT)
1779 return SendMessageW(hwnd, SBM_GETSCROLLBARINFO, (WPARAM)0, (LPARAM)info);
1781 return SCROLL_GetScrollBarInfo(hwnd, idObject, info);
1785 /*************************************************************************
1786 * SetScrollPos (USER32.@)
1788 * Sets the current position of the scroll thumb.
1791 * hwnd [I] Handle of window with scrollbar(s)
1792 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1793 * nPos [I] New value
1794 * bRedraw [I] Should scrollbar be redrawn afterwards?
1797 * Success: Scrollbar position
1801 * Note the ambiguity when 0 is returned. Use GetLastError
1802 * to make sure there was an error (and to know which one).
1804 INT WINAPI SetScrollPos( HWND hwnd, INT nBar, INT nPos, BOOL bRedraw)
1807 SCROLLBAR_INFO *infoPtr;
1810 if (!(infoPtr = SCROLL_GetInternalInfo( hwnd, nBar, FALSE ))) return 0;
1811 oldPos = infoPtr->curVal;
1812 info.cbSize = sizeof(info);
1814 info.fMask = SIF_POS;
1815 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1820 /*************************************************************************
1821 * GetScrollPos (USER32.@)
1823 * Gets the current position of the scroll thumb.
1826 * hwnd [I] Handle of window with scrollbar(s)
1827 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1830 * Success: Current position
1834 * There is ambiguity when 0 is returned. Use GetLastError
1835 * to make sure there was an error (and to know which one).
1837 INT WINAPI GetScrollPos(HWND hwnd, INT nBar)
1839 TRACE("hwnd=%p nBar=%d\n", hwnd, nBar);
1841 /* Refer SB_CTL requests to the window */
1843 return SendMessageW(hwnd, SBM_GETPOS, (WPARAM)0, (LPARAM)0);
1845 return SCROLL_GetScrollPos(hwnd, nBar);
1849 /*************************************************************************
1850 * SetScrollRange (USER32.@)
1851 * The SetScrollRange function sets the minimum and maximum scroll box positions
1852 * If nMinPos and nMaxPos is the same value, the scroll bar will hide
1854 * Sets the range of the scroll bar.
1857 * hwnd [I] Handle of window with scrollbar(s)
1858 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1859 * minVal [I] New minimum value
1860 * maxVal [I] New Maximum value
1861 * bRedraw [I] Should scrollbar be redrawn afterwards?
1865 BOOL WINAPI SetScrollRange(HWND hwnd, INT nBar, INT minVal, INT maxVal, BOOL bRedraw)
1869 TRACE("hwnd=%p nBar=%d min=%d max=%d, bRedraw=%d\n", hwnd, nBar, minVal, maxVal, bRedraw);
1871 info.cbSize = sizeof(info);
1872 info.fMask = SIF_RANGE;
1875 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1880 /*************************************************************************
1881 * SCROLL_SetNCSbState
1883 * Updates both scrollbars at the same time. Used by MDI CalcChildScroll().
1885 INT SCROLL_SetNCSbState(HWND hwnd, int vMin, int vMax, int vPos,
1886 int hMin, int hMax, int hPos)
1888 SCROLLINFO vInfo, hInfo;
1890 vInfo.cbSize = hInfo.cbSize = sizeof(SCROLLINFO);
1897 vInfo.fMask = hInfo.fMask = SIF_RANGE | SIF_POS;
1899 SCROLL_SetScrollInfo( hwnd, SB_VERT, &vInfo, TRUE );
1900 SCROLL_SetScrollInfo( hwnd, SB_HORZ, &hInfo, TRUE );
1906 /*************************************************************************
1907 * GetScrollRange (USER32.@)
1909 * Gets the range of the scroll bar.
1912 * hwnd [I] Handle of window with scrollbar(s)
1913 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1914 * lpMin [O] Where to store minimum value
1915 * lpMax [O] Where to store maximum value
1918 * TRUE if values is filled
1920 BOOL WINAPI GetScrollRange(HWND hwnd, INT nBar, LPINT lpMin, LPINT lpMax)
1922 TRACE("hwnd=%p nBar=%d lpMin=%p lpMax=%p\n", hwnd, nBar, lpMin, lpMax);
1924 /* Refer SB_CTL requests to the window */
1926 SendMessageW(hwnd, SBM_GETRANGE, (WPARAM)lpMin, (LPARAM)lpMax);
1928 SCROLL_GetScrollRange(hwnd, nBar, lpMin, lpMax);
1934 /*************************************************************************
1935 * SCROLL_ShowScrollBar()
1937 * Back-end for ShowScrollBar(). Returns FALSE if no action was taken.
1939 static BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar, BOOL fShowH, BOOL fShowV )
1941 ULONG old_style, set_bits = 0, clear_bits = 0;
1943 TRACE("hwnd=%p bar=%d horz=%d, vert=%d\n", hwnd, nBar, fShowH, fShowV );
1948 ShowWindow( hwnd, fShowH ? SW_SHOW : SW_HIDE );
1953 if (fShowH) set_bits |= WS_HSCROLL;
1954 else clear_bits |= WS_HSCROLL;
1955 if( nBar == SB_HORZ ) break;
1958 if (fShowV) set_bits |= WS_VSCROLL;
1959 else clear_bits |= WS_VSCROLL;
1963 return FALSE; /* Nothing to do! */
1966 old_style = WIN_SetStyle( hwnd, set_bits, clear_bits );
1967 if ((old_style & clear_bits) != 0 || (old_style & set_bits) != set_bits)
1969 /* frame has been changed, let the window redraw itself */
1970 SetWindowPos( hwnd, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE
1971 | SWP_NOACTIVATE | SWP_NOZORDER | SWP_FRAMECHANGED );
1974 return FALSE; /* no frame changes */
1978 /*************************************************************************
1979 * ShowScrollBar (USER32.@)
1981 * Shows or hides the scroll bar.
1984 * hwnd [I] Handle of window with scrollbar(s)
1985 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1986 * fShow [I] TRUE = show, FALSE = hide
1990 BOOL WINAPI ShowScrollBar(HWND hwnd, INT nBar, BOOL fShow)
1992 SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
1993 (nBar == SB_HORZ) ? 0 : fShow );
1998 /*************************************************************************
1999 * EnableScrollBar (USER32.@)
2001 * Enables or disables the scroll bars.
2003 BOOL WINAPI EnableScrollBar( HWND hwnd, INT nBar, UINT flags )
2006 SCROLLBAR_INFO *infoPtr;
2008 TRACE("%p %d %d\n", hwnd, nBar, flags );
2010 flags &= ESB_DISABLE_BOTH;
2012 if (nBar == SB_BOTH)
2014 if (!(infoPtr = SCROLL_GetInternalInfo( hwnd, SB_VERT, TRUE ))) return FALSE;
2015 if (!(bFineWithMe = (infoPtr->flags == flags)) )
2017 infoPtr->flags = flags;
2018 SCROLL_RefreshScrollBar( hwnd, SB_VERT, TRUE, TRUE );
2025 if (!(infoPtr = SCROLL_GetInternalInfo( hwnd, nBar, TRUE ))) return FALSE;
2026 if (bFineWithMe && infoPtr->flags == flags) return FALSE;
2027 infoPtr->flags = flags;
2029 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );